Water immersion and one-year storage influence the germination of the pyrenes of Copernicia alba Morong, a palm tree from a neotropical wetland

Hoehnea Pub Date : 2022-01-01 DOI:10.1590/2236-8906-78-2021
V. C. Soares, L. F. Daibes, G. A. Damasceno-Júnior, L. Lima
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引用次数: 1

Abstract

ABSTRACT Palm seeds are known for displaying dormancy and a thick endocarp that delays germination and embryo growth, but water treatments may accelerate their germination process. Additionally, ex-situ conservation of arecaceae species may cause loss of seed viability over time. Data on seed dormancy and storage have been neglected for many native palm species in Brazil. Therefore, we investigated the effect of water treatments and one-year storage on the germination of Copernicia alba Morong, a palm tree from the Brazilian Pantanal wetland. Fresh and stored pyrenes were immersed in water (at room temperature for 24, 48, and 72h) and in hot water (~75°C for 5 and 10-min). Fresh pyrenes germinated up to 84% in control, reaching 100% after water immersion for 48 and 72h. One-year storage reduced germination by almost 50%, but water immersion slightly increased the germination of stored pyrenes. Hot water decreased germination for both fresh and stored pyrenes. Seeds of C. alba may be classified as orthodox seed storage behavior. Taken all together, water treatments at room temperature improved the germination of the pyrenes. In contrast, long-term seed storage and hot-water treatments may jeopardize germination.
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新热带湿地棕榈树哥白尼(Copernicia alba Morong)的浸水和一年的贮藏对其果实的萌发有影响
众所周知,棕榈种子具有休眠和厚的内果皮,这延迟了发芽和胚胎的生长,但水处理可能会加速它们的发芽过程。此外,随着时间的推移,槟榔科物种的迁地保护可能会导致种子活力的丧失。关于种子休眠和储存的数据在巴西许多本地棕榈物种中一直被忽视。因此,我们研究了水处理和1年的储存对巴西潘塔纳尔湿地(Pantanal)棕榈树哥白尼(Copernicia alba Morong)发芽的影响。新鲜和储存的芘分别浸泡在水中(室温24,48和72h)和热水中(~75°C) 5和10分钟。鲜芘在对照中萌发率高达84%,水浸48和72h后达到100%。一年的储存降低了近50%的发芽率,但浸水略微提高了储存的芘的发芽率。热水降低了新鲜和储存的芘的萌发。白桦种子可归类为正统的种子储存行为。综上所述,室温下的水处理促进了比利牛斯的发芽。相反,种子长期储存和热水处理可能会危害发芽。
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来源期刊
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发文量
26
审稿时长
52 weeks
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